Combined superheater and boiler



April 26, 1927.

H. 0. W001. LEY newsman SUPERHEA'I'ER AND BOILER Filed Oct. 25. 1922tom - v (Java l abtmeq v I Patented ApnZG, 1927.

PATENT OFFICE.

UNITED STATES HAROLD O. WOOLlZEY, OF MAPLEWOOD, JERSEY, ASSIGNOR TOPOWER SPECIALTY COMPANY, on NEW YORK, N. Y'.,

A CORPORATION OF NEW YORK.

I COMBINED SU'PERI-IEATER AND BOIIJER.

-Applicaticn flled' bctob r 25, 1 922. Serial No. 598,700.

This invention relates to a combined boiler and superheater. and isdirected to the pro vision of a construction which will provide for themaximum of efficiency of gas flow in both the boiler and superheater. Afur ther. object of the invention resides in the provision of animproved arrangement of superheater and boiler which may be readilyapplied to boilers already in use without extensive change oralteration. Other objects and advantages will be set forth in furtherdetail in the accompanying specification and drawings which 'show'apreferred embodiment of the invention. v

The boiler comprises a lower water drum 10, an intermediate drum 11 andan upper steam drum 12; "Connecting the drums and 11 there is a bank ofsubstantially horizontal boiler tubes 13. A second bank ofverticalboiler tubes 14 connect drums llanrl 12 and athird bank ofinclined tubes 15 connect the steam and water drums 12- and 10. 16 isthe fire chamber containing the usual grate bars not shown; and 17 isthe duct to the stack.

The superheater is preferably located in a housing 18 in front of theboiler and alongside of the bank 1 1. When applying superheaters toboilers already in use the front wall of the boiler is removed and thehousing 18 substituted therefor. The superheater comprises inlet andoutlet headers 19 and 20 which extend from one end of the housing to theother and into which are connected U shaped superheater elements 21. Asuitable supply pipe 22 leads from the steam drum 12 to the inlet header19. By the above construction the entire Weight of the superheaterelements is carried directly upon the headers. Preferably the headersare located back of the drum 11 so as to be protected thereby from thedirect access of hot comprising a boiler having an upper steam gasesfrom thefire; r

To direct the hot gases over the boiler and superheater tubes in themost 'efiicient manner baiiies 23, 24,25 and'26are provided Thesebaflles serve to direct the hot gases of combustion longitudinally andtransversely over the tubes 13 thence transversely over the lower endsof the bank of tubes 14 into the superheater chamber and at right overthe corrugated elements thereof. From the superheater the gases passover the top of let duct 17., By'directing the gases in this manner,they the bafiles 25 and transversely across the upper parts of bank 14,and thence downwardly along the tubes 15 over bafile 26 to the outarecaused to flow at high velocity over both the boiler andsuperheatertubes. -Further-' more, the gases passingover the superheaterare tempered to a considerable extent before reaching the superheater.by reason of havdrum, a pair of lower water drums, banks Of bOIlGItubes connecting the said drums,

and including a horizontal, a vertical and an inclined bank of tubes a.superheaber having vertically arranged tubes disposed at one ingpreviously passed over and imparted and 'superheater, comprising incombination, an upper steam side of the vertical bank of tubes in asuperheater chamber disposed above and to the side of the lower waterdrum connected to the vertical bank of tubes, and baflles arrangedintermediate the boiler tubes and having connected therewith ahorizontally extending baflle extending through the vertical bank ofboiler tubes to a point adjacent the superheater, said battles beingadapted to direct'all of the hot gases of combustion first over thehorizontal and thence laterally over the vertical tubes and thencetransversely across the tubes of the superheater whereby all of thegases are tempered in temperature before reaching the.

said superheater.

2. A combined boiler and superheater drum, an intermediate drum, a lowerwater drum,. a bank of 1ncl1ned boilertubes connecting the upper andlower drums, a bank of vertical boiler tubes connectin the in termediateand upper drum and at ird bank 1 of boiler tubes connecting theintermediate and lower drums, a superheater having vertically arrangedtubes dis osedadjacent the vertical bank of boiler tu inlet and outletheaders for said superheater disposed below and behind the intermediatedrum, and said intermediate drum being adapted to baflies disposedbetwen the banks of boiler shield the super-heater headers from theditubes having portions thereof extending rect access of hot gases.through the vertical bank of boiler tubes, In testimony whereof Iheretoaflix my Sig 5 said baffies being adapted to direct the hot nature.

gases over various boiler tubes and transv versely over the tubes of thesuperheater, HAROLD O. WOOLLEY.

